NEEDS TEXT FROM NASIOC Progressive-ness of the PWI-2 system. The PERRIN PWI-1 system stood out amongst competitive systems because of it being one of the first truly progressive water injection systems. The new PWI-2 is still just as progressive as the older system but it stands out from the crowd for a few other reasons. Less expensive non-progressive systems are simple and cheap, and are restricted to a fixed volume of water that can be delivered. These systems […Continue Reading…]